[Enhancement] Make fast mode on IGCS work

[originalnicodr]

Describe the issue

From the work done on 736ebdf it might be possible to make IGCS fast mode work with the new override matrix method. However, I haven't been able to get into the necessary injection points of the HD rendering pipeline using reflection, so games that use this package will probably get a blurry output.

It would be useful to look into this further, as it can also benefit postprocessing effects rendering correctly when using the freecam in some games.